Method and apparatus for coating fluorescent powder on screw type fluorescent lamp tube

Abstract

The invention relates to a method and device of smearing fluorescence powder to screw type fluorescence lamp, it adopts the device with function of rotation and revolution to make the fluorescence powder slurry layer smeared evenly and solidified slowly in screw bent glass pipe, and the normal temperature air is as the moisture absorption agent, and combining the infrared radiation, firing in oven and desiccation of flowed circled air, technics of reinforcing coat, the fluorescence powder layer is insured not to be thick, and the thickness is even, it fits for insuring the quality of screw type fluorescence lamp, and can increase at least 3% or above of the luminescence efficiency, save 10% or above of fluorescence powder, and the device can set many screw bent glass pipe mounting rack, it can move slowly, work as sequence, operate circularly, the work efficiency can be increased greatly, and without technics that it adopts the definite 90deg.C hot air desiccant which is used in current technique, the production cost is decreased, it possesses advantages of reliability, convenient to use, evident saving energy, and possesses marked economy and strong practicability.

Description

technical field [0001] The invention relates to the technical field of fluorescent tube manufacturing technology, in particular to a method and a device for coating fluorescent powder on a spiral fluorescent tube. Background technique [0002] Among the high-power fluorescent tubes, the spiral fluorescent tube is favored by the market because of its energy saving, good lighting effect, compact structure, small size, high power and wide application range. In the manufacturing process of spiral fluorescent lamps, the process difficulty of evenly setting a phosphor layer on the inner wall of the spirally curved glass tube is the most difficult among all types of fluorescent lamps, and it is a major subject that manufacturers are currently studying to overcome. In the prior art, it is common to first pour phosphor slurry into the spirally curved glass tube, and then lower the end of the spirally curved glass tube to allow the excess phosphor slurry to flow out naturally under th...

AI Technical Summary

Problems solved by technology

The method of allowing the excess phosphor paste to flow out naturally under the action of gravity will inevitably lead to the following consequences: first, the formed phosphor layer is thick and uneven, and often results in local areas that are extremely thick or even piled up; second, Since the coating is thick and uneven, it will inevitably lead to low overall luminous efficiency and uneven illumination brightness, so it is difficult to guarantee the quality of new products; third, there is a serious waste of fluorescent powder, and it must be filled with a special 90 ° C heat Air, the additional cost is high; the fourth is that the overall production efficiency is low, it takes time to carry out the process of naturally flowing out the excess phosphor slurry, and it must be accompanied by the process of removing the phosphor layer accumulated at the nozzle.

Therefore, the cost of the product is relatively high, and the quality is difficult to guarantee. From the perspective of practicality and economy, the production process of the prior art coating spiral fluorescent tube phosphor layer is not ideal.

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